Fixture, Gauge & Workholding Management worked example

Fixture Changeover Time at 17% setup verification and delay allowance: a worked example

What does the result look like when setup verification and delay allowance reaches 17%? The full calculation is worked below with real intermediate numbers. Use it when planning machine downtime, setup labor, SMED improvements, or quick-change workholding schedules.

The inputs for this scenario

  • Fixture changeovers planned: 36 changeovers (unchanged)
  • Completed fixture changeovers per hour: 4 changeovers / hr (unchanged)
  • Setup verification and delay allowance: 17 % (raised for this scenario; the documented default is 15)

Working through the calculation

  • Applying the documented formula (Base fixture changeover time = fixture changeovers planned รท completed fixture changeovers per hour) to the inputs above produces each figure below.
  • At this operating point the engine returns 10.53 hr for required fixture changeover time, the number this scenario is built around.
  • At this operating point the engine returns 9 hr for base fixture changeover time.
  • At this operating point the engine returns 17 % for setup verification and delay allowance.
  • At this operating point the engine returns 4 changeovers / hr for completed fixture changeovers per hour.

How this compares with the baseline

  • Against the tool's baseline example, where setup verification and delay allowance sits at 15% and the headline result is 10.35 hr, this scenario comes in 1.74% above the baseline at 10.53 hr.
  • A figure at this level is achievable when setup verification and delay allowance is genuinely sustained, not just peaked for a shift. It assumes a steady average changeover rate; a single very difficult fixture or a missing tool can blow past the allowance and invalidate the estimate.

Results at a glance

  • Required fixture changeover time: 10.53 hr (headline result)
  • Base fixture changeover time: 9 hr
  • Setup verification and delay allowance: 17 %
  • Completed fixture changeovers per hour: 4 changeovers / hr

Run it with your numbers

  • Every input above is editable in the live Fixture Changeover Time calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.